/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 * 
 */

package org.apache.jmeter.control.gui;

import java.awt.BorderLayout;

import javax.swing.JCheckBox;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JTextField;

import org.apache.jmeter.control.ForeachController;
import org.apache.jmeter.gui.util.VerticalPanel;
import org.apache.jmeter.testelement.TestElement;
import org.apache.jmeter.util.JMeterUtils;

/**
 * The user interface for a foreach controller which specifies that its
 * subcomponents should be executed some number of times in a loop. This
 * component can be used standalone or embedded into some other component.
 */

public class ForeachControlPanel extends AbstractControllerGui {

	/**
	 * A field allowing the user to specify the input variable the controller
	 * should loop.
	 */
	private JTextField inputVal;

	/**
	 * A field allowing the user to specify output variable the controller
	 * should return.
	 */
	private JTextField returnVal;

	// Should we add the "_" separator?
	private JCheckBox useSeparator;

	/**
	 * Boolean indicating whether or not this component should display its name.
	 * If true, this is a standalone component. If false, this component is
	 * intended to be used as a subpanel for another component.
	 */
	private boolean displayName = true;

	/** The name of the infinite checkbox component. */
	private static final String INPUTVAL = "Input Field"; // $NON-NLS-1$

	/** The name of the loops field component. */
	private static final String RETURNVAL = "Return Field"; // $NON-NLS-1$

	/**
	 * Create a new LoopControlPanel as a standalone component.
	 */
	public ForeachControlPanel() {
		this(true);
	}

	/**
	 * Create a new LoopControlPanel as either a standalone or an embedded
	 * component.
	 * 
	 * @param displayName
	 *            indicates whether or not this component should display its
	 *            name. If true, this is a standalone component. If false, this
	 *            component is intended to be used as a subpanel for another
	 *            component.
	 */
	public ForeachControlPanel(boolean displayName) {
		this.displayName = displayName;
		init();
	}

	/**
	 * A newly created component can be initialized with the contents of a Test
	 * Element object by calling this method. The component is responsible for
	 * querying the Test Element object for the relevant information to display
	 * in its GUI.
	 * 
	 * @param element
	 *            the TestElement to configure
	 */
	public void configure(TestElement element) {
		super.configure(element);
		inputVal.setText(((ForeachController) element).getInputValString());
		returnVal.setText(((ForeachController) element).getReturnValString());
		useSeparator.setSelected(((ForeachController) element).getUseSeparator());
	}

	/* Implements JMeterGUIComponent.createTestElement() */
	public TestElement createTestElement() {
		ForeachController lc = new ForeachController();
		modifyTestElement(lc);
		return lc;
	}

	/* Implements JMeterGUIComponent.modifyTestElement(TestElement) */
	public void modifyTestElement(TestElement lc) {
		configureTestElement(lc);
		if (lc instanceof ForeachController) {
			if (inputVal.getText().length() > 0) {
				((ForeachController) lc).setInputVal(inputVal.getText());
			} else {
				((ForeachController) lc).setInputVal(""); // $NON-NLS-1$
			}
			if (returnVal.getText().length() > 0) {
				((ForeachController) lc).setReturnVal(returnVal.getText());
			} else {
				((ForeachController) lc).setReturnVal(""); // $NON-NLS-1$
			}
			((ForeachController) lc).setUseSeparator(useSeparator.isSelected());
		}
	}
    
    /**
     * Implements JMeterGUIComponent.clearGui
     */
    public void clearGui() {
        super.clearGui();
        
        inputVal.setText(""); // $NON-NLS-1$
        returnVal.setText(""); // $NON-NLS-1$
        useSeparator.setSelected(true);
    }
    

	public String getLabelResource() {
		return "foreach_controller_title"; // $NON-NLS-1$
	}

	/**
	 * Initialize the GUI components and layout for this component.
	 */
	private void init() {
		// The Loop Controller panel can be displayed standalone or inside
		// another panel. For standalone, we want to display the TITLE, NAME,
		// etc. (everything). However, if we want to display it within another
		// panel, we just display the Loop Count fields (not the TITLE and
		// NAME).

		// Standalone
		if (displayName) {
			setLayout(new BorderLayout(0, 5));
			setBorder(makeBorder());
			add(makeTitlePanel(), BorderLayout.NORTH);

			JPanel mainPanel = new JPanel(new BorderLayout());
			mainPanel.add(createLoopCountPanel(), BorderLayout.NORTH);
			add(mainPanel, BorderLayout.CENTER);
		} else {
			// Embedded
			setLayout(new BorderLayout());
			add(createLoopCountPanel(), BorderLayout.NORTH);
		}
	}

	/**
	 * Create a GUI panel containing the components related to the number of
	 * loops which should be executed.
	 * 
	 * @return a GUI panel containing the loop count components
	 */
	private JPanel createLoopCountPanel() {
		// JPanel loopPanel = new JPanel(new BorderLayout(5, 0));
		VerticalPanel loopPanel = new VerticalPanel();

		// LOOP LABEL
		JLabel inputValLabel = new JLabel(JMeterUtils.getResString("foreach_input")); // $NON-NLS-1$
		JLabel returnValLabel = new JLabel(JMeterUtils.getResString("foreach_output")); // $NON-NLS-1$

		// TEXT FIELD
		JPanel inputValSubPanel = new JPanel(new BorderLayout(5, 0));
		inputVal = new JTextField("", 5); // $NON-NLS-1$
		inputVal.setName(INPUTVAL);
		inputValLabel.setLabelFor(inputVal);
		inputValSubPanel.add(inputValLabel, BorderLayout.WEST);
		inputValSubPanel.add(inputVal, BorderLayout.CENTER);

		// TEXT FIELD
		JPanel returnValSubPanel = new JPanel(new BorderLayout(5, 0));
		returnVal = new JTextField("", 5); // $NON-NLS-1$
		returnVal.setName(RETURNVAL);
		returnValLabel.setLabelFor(returnVal);
		returnValSubPanel.add(returnValLabel, BorderLayout.WEST);
		returnValSubPanel.add(returnVal, BorderLayout.CENTER);

		// Checkbox
		useSeparator = new JCheckBox(JMeterUtils.getResString("foreach_use_separator"), true); // $NON-NLS-1$

		loopPanel.add(inputValSubPanel);
		loopPanel.add(returnValSubPanel);
		loopPanel.add(useSeparator);

		return loopPanel;
	}
}
